Abstract:
:Molecular mechanisms and pathological features of p-Cresyl sulfate (PCS)-induced uremic lung injury (ULI) in chronic kidney disease (CKD) remain unclear. We analyzed pleural effusions (PE) from CKD and non-CKD patients for uremic toxins, reactive oxygen species (ROS), and chemotactic cytokines. Correlations between PE biomarkers and serum creatinine were also studied. Cell viability and inflammatory signaling pathways were investigated in PCS-treated human alveolar cell model. To mimic human diseases, CKD-ULI mouse model was developed with quantitative comparison of immunostaining and morphometric approach. PE from CKD patients enhance expressions of uremic toxins, hydroxyl radicals, and IL-5/IL-6/IL-8/IL-10/IL-13/ENA-78/GRO α/MDC/thrombopoietin/VEGF. PE concentrations of ENA-78/VEGF/IL-8/MDC/PCS/indoxyl sulphate correlate with serum creatinine concentrations. In vitro, PCS promotes alveolar cell death, cPLA2/COX-2/aquaporin-4 expression, and NADPH oxidase/mitochondria activation-related ROS. Intracellular ROS is abrogated by non-specific ROS scavenger N-acetyl cysteine (NAC), inhibitors of NADPH oxidase and mitochondria-targeted superoxide scavenger. However, only NAC protects against PCS-induced cell death. In vivo, expressions of cPLA2/COX2/8-OHdG, resident alveolar macrophages, recruited leukocytes, alveolar space, interstitial edema and capillary leakage increase in lung tissues of CKD-ULI mice, and NAC pretreatment ameliorates alveolar⁻capillary injury. PCS causes alveolar⁻capillary injury through triggering intracellular ROS, downstream prostaglandin pathways, cell death, and activating leukocytes to release multiplex chemoattractants and extracellular ROS. Thus PCS and nonspecific ROS serve as potential therapeutic targets.
journal_name
J Clin Medjournal_title
Journal of clinical medicineauthors
Chang JF,Liang SS,Thanasekaran P,Chang HW,Wen LL,Chen CH,Liou JC,Yeh JC,Liu SH,Dai HM,Lin WNdoi
10.3390/jcm7090266subject
Has Abstractpub_date
2018-09-09 00:00:00issue
9issn
2077-0383pii
jcm7090266journal_volume
7pub_type
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pub_type: 社论
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更新日期:2019-12-03 00:00:00
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